Service area · London
Barnet is one of the largest London boroughs by area, covering everything from the dense Edwardian terraces of East Finchley to the substantial detached homes of Totteridge, Hampstead Garden Suburb, Whetstone and Hadley Wood. That range means our kit list and quoting approach both need to be broad — a one-bed flat in Hendon and a six-bed detached in Totteridge are not the same customer.
Barnet is a heat pump-friendly borough on paper. Plot sizes are generous by London standards, particularly in N20, EN4 and parts of N2 and N3. Planning is relatively straightforward outside the conservation areas, and we see strong demand from homeowners planning substantial retrofits with insulation improvements alongside a switch from gas.
On the boiler and air-con side, we do steady work across the borough. Mansion flats in Golders Green and Finchley Central. Period conversions in Highgate and Hampstead Garden Suburb. Newer builds around Mill Hill East. Every job gets the same approach: proper survey, written quote, clean install, and actually being there when you need us afterwards.
Borough
London Borough of Barnet
Postcodes
N2, N3, N10, N11, N12, N14, N20, NW2, NW4, NW7, NW9, NW11, EN4, EN5, HA8
Population
~395,000
Typical property
Detached or semi-detached family home
What we work on
Substantial 1920s-30s detached houses in Totteridge, Whetstone, Hadley Wood and Mill Hill. Hampstead Garden Suburb period properties (grade II listed conservation area — tight constraints). 1930s semis across Finchley, Hendon and Edgware. Mansion flats in Golders Green, Finchley Central and Hendon. Newer riverside-style developments around Mill Hill East, Colindale and Barnet town centre.
What Barnet homes ask for most
Heat pump retrofits are our fastest-growing category in Barnet. Larger plots mean outdoor siting is straightforward, and homeowners in the borough are actively weighing up the BUS grant against a new gas boiler. Boiler replacement is the steady baseline — particularly Viessmann system boilers for the larger family homes with multiple bathrooms. Underfloor heating shows up regularly in the kitchen extensions that are a common Barnet pattern.
Primary focus
Air source heat pumps, properly specified for London homes. MCS-certified installs, full grant support.
Learn moreAlso available
Gas and electric boiler installation, replacement, repair. Viessmann-trained engineers.
Learn moreAlso available
Wet underfloor heating for new builds, extensions and retrofit projects.
Learn moreAlso available
Annual servicing, emergency repairs and warranty work across every system we fit.
Learn moreLocal considerations
01
Hampstead Garden Suburb is a grade II-listed conservation area with its own Trust overseeing external alterations. External plant rooms, flue terminations and heat pump siting all need Trust approval. We have experience working within these constraints.
02
Most of the rest of the borough has the kind of garden space that makes heat pump siting painless. Side returns are common, rear gardens are typically deep enough to keep the outdoor unit well away from the house.
03
Free on most residential roads. Controlled parking zones around North Finchley, Finchley Central, Golders Green and Barnet town centres.
Representative projects
Illustrative of typical installations in the area. Verified customer case studies with permissions are added as they become available.
N20
postcode area
A Totteridge 1930s detached family home — six bedrooms, 240m² heated area, heat loss design load 12.8kW. Heat pump sited at the side of the house, emitter sizing upgraded in five rooms, existing cylinder replaced with a 400L heat-pump-compatible unvented. BUS grant deducted at quote.
N2
postcode area
An East Finchley 1920s family home with an awkward existing flue run. System boiler replacement including a new vertical flue arrangement, full power flush, 250L cylinder swap, and a fresh smart thermostat integrated with the weather-compensation control.
NW11
postcode area
A Hampstead Garden Suburb property requiring HGS Trust approval before install. Outdoor unit sited on a flat roof behind chimney stacks so invisible from the street. Three bedrooms cooled via low-profile wall-mounted units. Clean commissioning, neighbours unaware we were ever there.
Customer stories
Placeholder reviews shown while we build a verified Google and Checkatrade profile.
Replaced our old combi with a heat pump. Quiet, much cheaper to run, and the team left the plant room tidier than they found it.
Rachel M.
Dulwich · Heat pump
We had three quotes for a new Viessmann boiler. Thermalwerk was not the cheapest, but they were the only ones who actually explained the sizing.
David K.
Islington · Boiler replacement
Two Daikin units fitted across an open-plan living space. Clean cable runs, properly commissioned, works brilliantly. Glad we waited for them.
Priya S.
Kensington · Air conditioning
Talk to us
Tell us the postcode and the system you're thinking about — we'll come back the same working day with a proper plan and a realistic timeline.